Dernford Fen

Dernford Fen is a 10.3-hectare (25-acre) biological Site of Special Scientific Interest north-west of Sawston in Cambridgeshire.^[1][2]

Dernford Fen

Site of Special Scientific Interest
Location	Cambridgeshire
Grid reference	TL 472 503[1]
Interest	Biological
Area	10.3 hectares[1]
Notification	1983[1]
Location map	Magic Map

The site is a rare surviving example of rough fen and carr. Other habitats are dry grassland and scrub, together with ditches and a chalk stream. There are breeding warblers, and the diverse habitats are valuable for amphibians and reptiles.^[3]

The site is private land with no public access.